86 DR. A. H. COX: REPORT ON MAGNETIC DISTURBANCES IN NORTHAMPTONSHIRE 
Rocks from the Melton Mowbray and Irthlingborough Districts (continued). 
Summary of Magnetic Pro'perties (continued). 
V olume-susceptibility 
Specimen 
Description and locality. 
Weight 
of 
Density. 
sing 
Force H 
in 10“= C.G.S. units. 
Refer- 
No. 
ence 
specimen. 
in C.G.S. 
units. 
Individual 
Average 
page. 
values. 
value, 
II. Iron Ores (continued). 
(b) Limonite Ores from Mmisfone, 
gr. 
Melton Moiohray District. 
L. 71 
Fine-grained concretionary ore, 
• 5-677 
2-640 
96 
9-9 1 
quarry south of AVhite Lodge, 
200 
9-2 
10 
near Eastwell 
300 
10-4 
(A second specimen). 
7-567 
2-580 
247 
10-5 ' 
1 
10-5 
196 
10-5 
97 
104 
L. 63 
Oolitic ore, Wartnaby. 
8-49 
2-250 
200 
20-7 1 
L 
21 
Re-tested after being reduced to 
5-670 
2-670 
98 
92 
21-4 J 
20-6 
r 
L 
23 
’ and 
110 
circular cross-section 
180 
26-2 J 
(Another specimen). 
by magn 
etometer 
— 
— 
30 
L. 70 
Ferruginous limestone, “Sandrock,” 
6010 
2-420 
385 
2-2 - 
L 
0 • 0 
Wartnaby 
587 
2-2 J 
r 
Haematite (inserted for com- 
16-56 
4-91 
160 
22-1 ' 
L 
09 
pari son) 
97 
21-9 J 
r 
(c) Clay Ironstones from Coal 
Measures. 
L. 19 
Clay-ironstone concretion, lower 
13-825 
3 - 335 
86 
32-4 1 
L 
34-5 
98 
>104 
L. 28 
Coal Measures, New Stanton, 
Derbyshire 
108 
36-9 J 
r 
1 
Clay-ironstone, fire-clays, Cossall 
11-612 
2-930 
48 
20-6 ■ 
1 
21-5 
127 
brick pit, Erewash Valley, 
Nottinghamshire 
92 
22-6 J 
r 
J 
Ankerite, film on coal (inserted 
4-555 
2-52 
158 
10-8 1 
1 
10 
for comparison) 
101 
9-7 J 
r 
I 
III. Limestones and Dolomites. 
r 97 
stir] 
L. 58 
Compact limestone, “ Cement- 
12-145 
2 - 640 
515 
0 - 38 \ 
0 • 38 
i 
stones,” Lower Lias, Barrow- 
on-Soar, Leicestershire 
300 
0 - 38 J 
< 
1 
,103 
! L. 37 
Dolomite, Magnesian Limestone, 
8-610 
2 - 650 
605 
0-18 
0-18 
1 
104 
Buhvell, Nottinghamshire 
)«and 
L. Ill 
Dolomite, fine-grained, Carboni- 
9 - 320 
0 
00 
603 
0-47 
0-47 
. 
125 
ferous Limestone, Cloud Hill, 
Leicestershire 
IV. Clays and Slates. 
N. 78 
Blue clay. Upper Lias, No. 1 Pit, 
8-305 
1-84 1 
94 
2-0 1 
f 88 
Irthlingborough 
250 
1-9 
2 
and 
375 
2-0 
,104 
L. 9 
Blue slate, Swithland Slates, Wood- 
8-200 
2-780 
245 
3-9 1 
1 
3-9 
-V 
house Eaves, Charnwood Forest 
355 
3-9 J 
r 
L. 102 
Hornfels, contact-altered slate. 
7 - 785 
2-740 
242 
3-3 1 
1 
3-2 
- 104 
Brazil Wood, near Mount Sorrel 
332 
3-2 J 
r 
L. 112 
Hornfels, contact-altered .slate. 
6-700 
2-810 
240 
6-4 1 
1 
6-1 
Brazil Wood, near Mount Sorrel 
237 
5-9 
r 
